Question

find the volume of a right circular cylinder whose height is 20 cm and diameter of the base is 14cm also find the capacity in litres ​

Answer 1

Answer: Given: Diameter of base of cylinder =14 cm.

∴ Radius (r)=  

2

14

​

=7 cm.

and Height of cylinder is h=20 cm.

So, Surface area of cylinder =2πr(r+h)

                                               

                                               =2×  

7

22

​

×7(7+20)

                                               

                                               =44×27

Surface area of cylinder =1188 sq.cm.

Volume of cylinder =πr  

2

h

                               =  

7

22

​

×7  

2

×20

                               =22×7×20

Volume of cylinder=3080 cu.cm

Step-by-step explanation:

Answer 2

Answer:

3080

Step-by-step explanation:

formula of volume is πr square h